I have been having some trouble keeping my Genesis running. I noticed that there were a lot of bubbles in the fuel line. I found that the stock cap for the fuel tank is horrible and was allowing air to enter the tank. I replaced this with an expandable rubber stopper and replaced the fuel lines. I have rebuilt the carb and now when I try to start the vehicle it does not pull fuel from the tank. The piston and sleeve seem to be okay because I can hear the compression and can feel air coming from the exhaust. I have no idea as to why my engine will not pull fuel from the tank. If I remove the fuel line coming from the exhaust and blow into it fuel easily pushes through the hose. I am convinced that if I were to remove the tank from the car and hold it high enough to where gravity would feed fuel into the engine that it would work fine. Does anybody have some input as to what the problem is? Thanks for any help.